/Engine/Source/Editor/MergeActors/Public/IMergeActorsModule.h
Register anIMergeActorsToolwith the module, passing ownership to it
bool RegisterMergeActorsTool ( [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [IMergeActorsTool](API\Editor\MergeActors\IMergeActorsTool) > Tool )